railway RRB JE (CBT I + CBT II) Mock Test 2024 General Science Chemistry Chemistry in Everyday Life

खालीलपैकी कोणता अ-जैवअपघटनीय पदार्थ आहे?

1
कागद
2
एक प्लास्टिक पिशवी 
3
लाकूड
4
भाज्यांच्या साली
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